Complete an act with every single modifier enabled.

Achievement Guide for Why Would You Even Do This?

Achievement won on 27 Sep 11TA Score for this game: 3,744
Posted on 27 September 11 at 19:54

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From the main menu, go to Special Features >> Bonus Store >> Exclusive Content.

If you have earned enough cash from playing the game, you can purchase game modifiers from this section. (I am not sure, but some of the content may need to be unlocked before purchasing by reaching certain criteria in-game).

Once you have purchased all four of these modifiers, go to the level select and choose an act (Please note that the Prologue does not count for this achievement).

Once you select an act, you will see a screen where you can toggle Hardcore Mode or Commentaries. There will be a box on this page that will default as "0 Modifiers". Highlight the box and you will be prompted to edit the modifiers used for your game.

Select all four of the above mentioned multipliers and start playing. Once you finish the act, the achievement will unlock. Again, I can confirm the Prologue doesn't count, and would imagine the Epilogue would not count for the achievement either.